/* Test of system-quote module.
   Copyright (C) 2012-2022 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2012.  */

#include <config.h>

/* Specification.  */
#include "system-quote.h"

#if defined _WIN32 && !defined __CYGWIN__
# define WINDOWS_NATIVE
#endif

#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef WINDOWS_NATIVE
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
#endif

#include "macros.h"

#define EXPECTED_DATA_FILE "t-sq-data.tmp"

static int failed;

static void
check_one (enum system_command_interpreter interpreter, const char *prog,
           const char *input)
{
  char buf[1000];
  size_t output_len;
  char *output;
  char *bufend;

  output_len = system_quote_length (interpreter, input);

  output = system_quote (interpreter, input);
  ASSERT (strlen (output) == output_len);

  ASSERT (output_len <= sizeof (buf) - 2);
  memset (buf, '\0', output_len + 1);
  buf[output_len + 1] = '%';
  bufend = system_quote_copy (buf, interpreter, input);
  ASSERT (bufend == buf + output_len);
  ASSERT (memcmp (buf, output, output_len + 1) == 0);
  ASSERT (buf[output_len + 1] == '%');

  /* Store INPUT in EXPECTED_DATA_FILE, for verification by the child
     process.  */
  {
    FILE *fp = fopen (EXPECTED_DATA_FILE, "wb");
    if (fp == NULL)
      exit (3);
    if (fwrite (input, 1, strlen (input), fp) != strlen (input))
      exit (4);
    if (fclose (fp))
      exit (5);
  }

  /* Invoke the child process through system() and popen().  */
  {
    char command[1000];

    sprintf (command, "%s %s", prog, output);

    switch (interpreter)
      {
      case SCI_SYSTEM:
#ifdef WINDOWS_NATIVE
      case SCI_WINDOWS_CMD:
#endif
        {
          int exitcode = system (command);
          if (exitcode != 0)
            {
              fprintf (stderr, "for input = |%s|: system() command failed with status %d: %s\n",
                       input, exitcode, command);
              failed = 1;
            }
        }
        {
          FILE *fp = popen (command, "r");
          int exitcode = pclose (fp);
          if (exitcode != 0)
            {
              fprintf (stderr, "for input = |%s|: popen() command failed with status %d: %s\n",
                       input, exitcode, command);
              failed = 1;
            }
        }
        break;
#ifdef WINDOWS_NATIVE
      case SCI_WINDOWS_CREATEPROCESS:
        {
          PROCESS_INFORMATION pinfo;
          STARTUPINFO sinfo;
          sinfo.cb = sizeof (STARTUPINFO);
          sinfo.lpReserved = NULL;
          sinfo.lpDesktop = NULL;
          sinfo.lpTitle = NULL;
          sinfo.cbReserved2 = 0;
          sinfo.lpReserved2 = NULL;
          sinfo.dwFlags = STARTF_USESTDHANDLES;
          sinfo.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
          sinfo.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
          sinfo.hStdError = GetStdHandle (STD_ERROR_HANDLE);

          if (CreateProcess (NULL, command, NULL, NULL, TRUE, 0, NULL, NULL,
                             &sinfo, &pinfo))
            {
              DWORD exitcode;
              CloseHandle (pinfo.hThread);
              if (WaitForSingleObject (pinfo.hProcess, INFINITE) == WAIT_OBJECT_0)
                {
                  if (GetExitCodeProcess (pinfo.hProcess, &exitcode))
                    {
                      if (exitcode != 0)
                        {
                          fprintf (stderr, "for input = |%s|: CreateProcess() command failed with status %d: %s\n",
                                   input, exitcode, command);
                          failed = 1;
                        }
                    }
                  else
                    {
                      fprintf (stderr, "for input = |%s|: GetExitCodeProcess failed, GetLastError() = %u\n",
                               input, GetLastError ());
                      failed = 1;
                    }
                }
              else
                {
                  fprintf (stderr, "for input = |%s|: WaitForSingleObject failed\n",
                           input);
                  failed = 1;
                }
              CloseHandle (pinfo.hProcess);
            }
          else
            {
              fprintf (stderr, "for input = |%s|: CreateProcess failed, GetLastError() = %u\n",
                       input, GetLastError ());
              failed = 1;
            }
        }
        break;
#endif
      default:
        break;
      }
  }

  free (output);
}

static void
check_all (enum system_command_interpreter interpreter,
           bool windows_cmd_limitations,
           const char *prog)
{
  /* Check the system_quote_length, system_quote_copy, system_quote
     functions.  */
  {
    int c;

    /* Empty argument.  */
    check_one (interpreter, prog, "");

    /* Identifier or number.  */
    check_one (interpreter, prog, "foo");
    check_one (interpreter, prog, "phr0ck");

    /* Whitespace would be interpreted as argument separator by the shell.  */
    check_one (interpreter, prog, "foo\tbar");
    if (!windows_cmd_limitations)
      {
        check_one (interpreter, prog, "foo\nbar");
        check_one (interpreter, prog, "foo\rbar");
      }
    check_one (interpreter, prog, "foo bar");

    /* '!' at the beginning of argv[0] would introduce a negated command.  */
    check_one (interpreter, prog, "!foo");

    /* '"' would be interpreted as the start of a string.  */
    check_one (interpreter, prog, "\"foo\"bar");

    /* '#' at the beginning of an argument would be interpreted as the start
       of a comment.  */
    check_one (interpreter, prog, "#foo");

    /* '$' at the beginning of an argument would be interpreted as a variable
       reference.  */
    check_one (interpreter, prog, "$foo");

    /* '&' at the beginning of an argument would be interpreted as a background
       task indicator.  */
    check_one (interpreter, prog, "&");

    /* "'" would be interpreted as the start of a string.  */
    check_one (interpreter, prog, "'foo'bar");

    /* '(' at the beginning of argv[0] would introduce a subshell command.  */
    check_one (interpreter, prog, "(");

    /* ')' at the beginning of an argument would be interpreted as the end of
       the command.  */
    check_one (interpreter, prog, ")");

    /* '*' would be interpreted as a wildcard character.  */
    check_one (interpreter, prog, "*");
    check_one (interpreter, prog, "*foo");

    /* ';' at the beginning of an argument would be interpreted as an empty
       statement in argv[0] and as the end of the command otherwise.  */
    check_one (interpreter, prog, ";");
    check_one (interpreter, prog, "foo;");

    /* '<' would be interpreted as a redirection of stdin.  */
    check_one (interpreter, prog, "<");

    /* '=' inside argv[0] would be interpreted as an environment variable
       assignment.  */
    check_one (interpreter, prog, "foo=bar");

    /* '>' would be interpreted as a redirection of stdout.  */
    check_one (interpreter, prog, ">");

    /* '?' would be interpreted as a wildcard character.  */
    check_one (interpreter, prog, "?");
    check_one (interpreter, prog, "??");
    check_one (interpreter, prog, "???");
    check_one (interpreter, prog, "????");
    check_one (interpreter, prog, "?????");
    check_one (interpreter, prog, "??????");
    check_one (interpreter, prog, "???????");
    check_one (interpreter, prog, "????????");
    check_one (interpreter, prog, "?????????");
    check_one (interpreter, prog, "??????????");
    check_one (interpreter, prog, "foo?bar");

    /* '^' would be interpreted in old /bin/sh, e.g. SunOS 4.1.4.  */
    check_one (interpreter, prog, "^");

    /* "[...]" would be interpreted as a wildcard pattern.  */
    check_one (interpreter, prog, "[");
    check_one (interpreter, prog, "]");

    /* '\' would be interpreted as an escape character.  */
    check_one (interpreter, prog, "\\foo");

    /* '`' would be interpreted as the start of a command substitution.  */
    check_one (interpreter, prog, "`foo");

    /* '{' at the beginning of argv[0] would introduce a complex command.  */
    check_one (interpreter, prog, "{");

    /* '|' at the beginning of an argument would be interpreted as a pipe
       between commands.  */
    check_one (interpreter, prog, "|");

    /* '}' at the beginning of an argument would be interpreted as the end of
       the command.  */
    check_one (interpreter, prog, "}");

    /* '~' at the beginning of an argument would be interpreted as a reference
       to a user's home directory.  */
    check_one (interpreter, prog, "~");
    check_one (interpreter, prog, "~foo");

    /* A string that contains both ' and ".  */
    check_one (interpreter, prog, "foo'bar\"baz");

    /* '%' is used for environment variable references in Windows cmd.exe.  */
    check_one (interpreter, prog, "%");
    check_one (interpreter, prog, "%%");
    check_one (interpreter, prog, "%foo%");
    check_one (interpreter, prog, "%PATH%");

    /* All other characters don't need quoting.  */
    for (c = 1; c <= UCHAR_MAX; c++)
      if (strchr ("\t\n\r !\"#$&'()*;<=>?^[\\]`{|}~", c) == NULL)
        {
          char s[5];
          s[0] = 'a';
          s[1] = (char) c;
          s[2] = 'z';
          s[3] = (char) c;
          s[4] = '\0';

          check_one (interpreter, prog, s);
        }
  }
}

int
main (int argc, char *argv[])
{
  char *prog;

  if (argc != 2)
    {
      fprintf (stderr, "%s: need 1 argument\n", argv[0]);
      return 2;
    }
  prog = argv[1];

#ifdef WINDOWS_NATIVE
  /* Make PROG suitable for native Windows system calls and cmd.exe:
     Replace '/' with '\\'.  */
  {
    char *p;
    for (p = prog; *p != '\0'; p++)
      if (*p == '/')
        *p = '\\';
  }
#endif

#ifdef WINDOWS_NATIVE
  check_all (SCI_SYSTEM, true, prog); /* equivalent to SCI_WINDOWS_CMD */
  check_all (SCI_WINDOWS_CREATEPROCESS, false, prog);
  check_all (SCI_WINDOWS_CMD, true, prog);
#else
  check_all (SCI_SYSTEM, false, prog); /* equivalent to SCI_POSIX_SH */
#endif

  /* Clean up.  */
  unlink (EXPECTED_DATA_FILE);

  return failed;
}
